Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/04—Wing frames not characterised by the manner of movement
  • E06B3/263—Frames with special provision for insulation
  • E06B3/267—Frames with special provision for insulation with insulating elements formed in situ

Definitions

• Composite profile a basic metal profile to be used for making such composite profile, and a method of making such a composite profile.
• the present invention relates to a composite profile, a basic metal profile to be used for making such composite profile, and a method of making such composite profile.
• the composite profile comprises two metal members which are held apart from each other and interconnected by means of at least two insulating bars which have been cast in situ and thereby fixed in grooves formed between flanges on the metal members.
• Such a composite profile and a method of making it are pre ⁇ viously known.
• a basic metal profile in which two of the outer flanges which contribute to define grooves are bridged to form the bottom of a mold for the casting of one of the insulating bars. This bar is cast from the inside of the profile.
• a mold bottom consisting of a thin foil is inserted between the two inner flanges which contribute to define grooves, and the second insulating bar is cast from the outside.
• the thin foil After the casting the thin foil will be kept fixed between the flanges and the second insulating bar. There ⁇ after the bridging element is removed, for instance by planing, milling or tearing, and only the insulating bars and the foil remain to connect the two separate metal profiles which have thus been formed. It is an object of the present invention to provide a compo ⁇ site profile which has better insulating properties than the prior art profile. Another object is to provide a basic metal profile to ' be used for making such composite profile, said basic metal profile and said method resulting in improve ⁇ ments with respect to the insulating properties of the composite profile and advantages with respect to the manu ⁇ facturing of the composite profile.
• the composite profile of the present invention is characterize in that it partially is made from a single basic metal profile, the inner flanges of the profile being interconnected in pairs through bridging elements which together with the inner flange make mold bottoms for the casting of the insulating bars, said mold bottoms being at ' least split longitudinally of the profile after the casting.
• a basic metal profile according to the invention, preferably extruded, to be used for making the composite profile, is characterized in that the inner flanges are interconnected in pairs through bridging elements.
• a method according to the invention is characterized in that the insulating bars are cast in a single basic metal profile, in which the inner flanges are interconnected in pairs through bridging elements, which together with the inner flanges form mold bottoms during the casting, and that the mold bottoms are at least split lengthwise of the profile after the casting.
• the walls of the metal profiles and the insulating bars define a hollow space.
• the basic metal profile used for making the prior art composite profile is half open, i.e. channel shaped, because a continuous opening runs between those flanges which define the grooves adapted for one of the insulating bars.
• the composite profile is fully closed, and anodizing of the inner surfaces will only take place a short distance inwardly from each end of the profile.
• the method presupposes that the insulating bars are able to withstand the anodizing process.
• the convection may be reduced, by separating the bridging elements from one of the flanges and bending them into the hollow space.
• the bridging elements may be split longitudinally along their central areas, whereafter the halves are bent into the hollow space. The bent bridging elements will then reduce the circulation of air and hence the convection.
• Ey means of a suitable ratio between the cross sectional dimensions in the hollow space may be achieved that the bridging elements bent into the space make ribs which act as flaps to slow down the air movements in the space.
• the bridging elements When the basic metal profile is anodized prior to the casting of the insulating bars, it is of advantage with respect to the heat transfer by radiation that the bridging elements are completely removed, or that they are only slightly bent into the hollow space, because the anodized surfaces of the bridging elements will act as radiation surfaces. The fact that the elements protrude slightly into the space will still reduce the heat transfer by convection by slowing down the air movements, and at the same time is avoided that the bridging elements contribute substantially to heat transfer by radiation.
• a substantial advantage achieved with the present invention is the increased stability with respect to shape of the basic metal profile. Because the insulating bars are cast in situ the basic metal profile alone will determine the shape of the finished composite profile, and the present invention makes it possible to carry out the casting without specific pre ⁇ cautions to prevent cross sectional deformation of the basic metal profile prior to or during the casting. Further, the invention eliminates the need of a foil to make a mold bottom for the second insulating bar.
• the heat transfer may be further reduced by providing some sort of strip between the insulating bars. This can be done both when the bridging elements are completely removed and when they are split and bent into the hollow space. The bending or removal of the bridging elements will then leave room for the strip, which is preferably only engaging the insulating bars. Thereby convection between the metal surfaces inside the hollow space is prevented, and provided that the strip is made of a material having a low heat conduc ⁇ tivity, the entire heat transfer between the metal surfaces may be substantially reduced, probably by about 30 % . More ⁇ over, the strip will cause a substantial reduction of the heat transfer by radiation.
• grooves are formed in the inner surfaces of the insulating bars, in order to secure the strip in its place.
• Such grooves may be formed in a simple manner, by forming the bridging elements with longitudinal ribs on the sides facing outwardly in the basic metal profile. By casting the insulating bars, these will consequently have grooves on their inner sides, complementary to the ribs on the bridging elements.
• This can not be achieved by the prior art method described introductorily, by which method the single bridging element constitutes a mold part for the outer surface of one of the insulating bars.
• the inner surface. of the same bar is formed as a free surface, by moving a spraying nozzle along the groove which forms the mold, said nozzle spraying insulating bar casting material into the groove.
• the present invention brings about a further possibility of reducing the heat transfer.
• Fig. 1 shows an embodiments in which the bridging elements have been split longitudinally along their central areas, space in the composite profile.
• Fig. 2 shows an embodiment wherein grooves have been formed on the inner surfaces of the insulating bars, and a strip has been inserted and extends between the grooves.
• Equal reference numerals are used for equal or eqvivalent parts in the two figs.
• the composite profile shows in fig. 1 comprises two. metal members 1 and 2, which of course may comprise further details and parts than those shown, for instance channels for mounting of glass or sealing strips or for other purposes, depending on the application of the composite profile.
• the composite profile shown comprises two insulating bars 3, which have been cast in situ by use of the bridging elements 4 as a part of the mold bottom, which has been possible because the bridging elements connect the inner flanges 6 in pairs in the basic metal profile.
• the bridging elements 4 have been bent inwardly into the hollow space, and thereby cause a consider ⁇ able reduction of the heat transfer by convection.
• the metallic connection between the metal members 1 and 2 is completely broken, and heat transfer by conduction may only take place through the insulating bars 3. These have a very ⁇ small heat conductivity compared with metal.
• the insulating bars are fixed between the flanges 5 3nd 6 on each of the metal members 1 and 2.
• the insulating bars are cast in situ in a basic metal profile comprising two parallel bridging elements, whereupon the bridging elements, in this embodiment, are split longitudinally along their central areas and are bent into the hollow space. This splitting and bending may be carried out in one operation, by means of a tool which is forced
• OMFI longitudinally through the hollow space and splits and bends ⁇ the bridging elements, preferably simultaneously on the two sides, so that the metal profile is only subjected to free forces in the longitudinal direction, because transverse forces caused by the splitting and bending will then counteract and balance each other.
• the embodiment shown in fig. 2 also comprises metal members 1 and 2 and insulating bars 3, as well as flanges 5 and 6 which form grooves for the insulating bars.
• the insulating bars have grooves in their inner surfaces, and a partition strip 7 has been inserted into and extends between these grooves.
• the bridging elements have been removed completely, but they might alternatively have been bent sufficiently into the hollow space to allow the insertion of the strip 7.
• Such strip or strips may have a stiff ⁇ ness sufficient to make it possible to push the strip or strips into the profile, but it is also possible to pull the. strip or strips into the profile.

Landscapes

• Engineering & Computer Science (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Casting Or Compression Moulding Of Plastics Or The Like (AREA)
• Insulating Bodies (AREA)
• Materials For Medical Uses (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Rod-Shaped Construction Members (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19884746

Family Applications (1)

Country Status (4)

Cited By (4)

Citations (5)

• 1979
  • 1979-03-16 NO NO790896A patent/NO152464C/no unknown
• 1980
  • 1980-03-12 WO PCT/NO1980/000006 patent/WO1980001930A1/en unknown
  • 1980-11-12 DK DK482980A patent/DK154034C/da not_active IP Right Cessation
  • 1980-11-14 SE SE8008029A patent/SE439799B/sv not_active IP Right Cessation

Patent Citations (5)

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